Method-

Preheat your oven to 180 degrees Celcius.
Grate 1 cup carrots (around 1 medium sized carrot). Sieve the flour and baking soda, baking powder twice. Powder the jaggery or grate it. Take the wet ingredients in a bowl. Whisk the curd well so that there are no lumps. Next add the oil and whisk again. Add the jaggery powder and mix well. Add vanilla essence. Now add the dry ingredients and stir so that there are no lumps. Fold in the grated carrots. Add a ladleful of batter to the cupcake liners. Bake for 10-15 min till a toothpick inserted comes out clean.